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Same as for NTP and DNS, managed DHCP means that you want to run dhcpd on sipXecs and have all configuration / management performed by sipXecs. There are settings you could configure but certain are not possible (like multiple subnet configuration). We're looking for user feedback in order to expose settings that are mostly used.
Unmanaged service
When DHCP is marked as unmanaged service creating configuration files (dhcpd.conf) and stopping / starting DHCP service it's up to admin.
IPTables
TBD
Phonelogd
TBD